Track-drill



A. L. STANFORD.

TRACK DRILL.

APPLIGATION FILED MAY 8, 1914.

Patented Nov. 17, 1914.

3 SliEETS-SHEET 1.

THE NORRIS PETERS 60.. FHOTO-LITHQ. WASHINGTON. D. C.

A. L. STANFORD.

TRACK DRILL.

APPLICATION FILED MAY. 8. 1914.

1,1 17,610. Patented Nov. 17,1914.

3 SHEETS-SHEET 2.

THE NORRIS PETERS co.. PHOTO-LITHD. WASHINGmN, D. C

A. L. STANFORD.

TRACK DRILL.

APPLICATION FILED MAY 8, 1914.

Patented Nov. 17,1914.

THE NORRIS PETERS 60., FHOTD-LITHOu WASHINGTON, D. c.

. UNITED STATES PATENT OFFICE.

ARTHUR L. STANFORD, OF CHICAGO, ILLINOIS. A

TRACK-DRILL.

To all whom it mag concern:

Be it known that I, ARTHUR L. STA NFoRD, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented-certain new and useful Improvements in Track-Drills, of

which the following is a specification.

The present invention relates to a drill more particularly adapted andintended for use in connection with drilling holes through thewebs ofrailroad rails, etc'., for the purpose ofrepairs, etc.

The objects of the present invention are to provide a driving and drivenmember for the drill mechanism and to supply an endless member for.transmitting power from the driving to the driven member and toprovide'a casing or inclosure for the endless member.

; A further object of the invention is to provide an upright frame and ahorizonal' frame which latter frame embodies members for engaging therail. A further object is to mount the drilling mechanism in the uprightframe and to provide a support for the rear end of thedrilling mechanismin: the nature of a universal joint, and to provide a support for theforward end in the form of aswinging cradle.

A further objectof the invention is to pro vide a quick. and easy meansfor removlng the drill from the track in case of an ap-I proaching trainor. otherwise.

A further object of the invention is to provide a means for" feeding thedrilling tool forward, which means shall be in the nature of a frictionbrake, and under the entire control of the operator.

A further object is.to provide an automatic means for feeding thedrilling tool forward and to further provide means for throwing theautomatic feeding means into and out of operative condition.

The invention further consists in the features of construction andcombinations of parts; hereinafter described and claimed.

In the drawings: Figure 1 is a front view of the device of the presentinvention in operative position; Fig. 2 is a section showing theupright, frame and the manner whereby it incloses or houses theendlessmember; Fig. 3 is a side view partly in sec- Specffication of LettersPatent.

tionof-the device of the present invention; Fig. 4: is an enlargedsectional view of the drilling mechanism;-Fig. 5 is a plan view of theassembled device with oneof the operat- Patented Nov. 1'7, 1914.-Applieation filed May 8,1914; Serial No. 837,316. r v I 3 ing handlesbroken away; Fig. 6 is'a detail of the manually operated drill feedmechanism; and Fig. 7 is a detail of the gear mechanism for effectingthe automatic feed.

Referring. now to the drawings, and par ticularly to 1, the device asshown,

comprises an upright frame 8 and a'zhori zontallqframe' 9, this latterbeing better' shown perhaps in Figs. 3' and 5. The frame 8 consists ofouter tubular sections 10 joined by a web 11 and mounted in this frameis a" sprocket 12 which may be termed a driving member, and thissprocket is actuated by means of crank arms 13 to which are connectedsuitable handles 14, the frame, as will-be seen fromthe drawings, issuitably .cut away to permit assembling of thev sprocket. As shown inFig. 1, the bearing.

for this: sprocket is adjustable in order to allow it to accommodateitself "to take" up any slack that may occur in the endless member. Asprocket .15 is located in the lower portion of the frame 8 and thissprocket may betermed'the driven member," a'ndfor. the purpose oftransmitting power from the driving member to the driven mem-" her Iemploy in the form illustrated a sprocket'chain 16; it will be seenthatthe" frame is suitably cut away to permit assembling of the sprocket.The sprocket chain, as shown in Fig- 2, travels within the tubularportions 10 of the frame 8, and the tubular portion forms in eifecta'housing or closure for this chain wherebyv the danger of itsbecomingclogged or choked by'reason of dust or dirt is eliminated, thusinsuring afree and easycoperation of the drill.

What may be termed the drill mechanism proper consists of a spindle 17and a stem 18, the spindle is formed with a chuck portion 17 arranged toreceive a suitable form of drill member 19. The'spindle' is formed withan interiorbore 20 which 'is threaded to provide an interior threadedsurface 21. The stem 18 is enlarged at its forward end to provide a head22 which is e'xteriorly threaded to mesh with the threads of thethreaded surface 21,

provides a ball and socket or universal com' easy matter. it n i,

The socket is formed with arearwardly' pivoted at 26* to the rear end"of the horizon+ tal frame 9-; Theball 23 forms themale member, and thesocket 24L thefemalemember, of a ball and socket'joint. As "will bereadily understood from the drawings, this nection between the drillmechanism and horizontal frame whereby the upright frame haveany'relative movement desired with respect to the horizontal frame,-thusmaking the positioning of projecting lug or, lip and abaror keyQS' isprovided which, as shown inF-igs; 3 and' o,"

is; adapted to beinserted between "the lower face of this lip and theupper edge ofthe rearward portion of the frame 9 and whenf so; insertedsecurely locks the socket 25 against. rearward movement 1 and thus ren jders the socket a back ng or reslstanceplece for, the drillIIlBClliLIllSIII. WVhen, however,-

f it is desired to-remove the drilltheoperation is quick and simple, andsimplyconsists in preferable to have the forward feed aam matic in itsnature so=that the operator need driving or otherwise forcing the key orbar;

28} from its position beneath the lug 27 whereupon the socket is free toswing upon its pivot 26, and the upright frame 8, to

gether with the drill mechanism,; can" be tippedupor down as desired,,"and-together with the frame 9, removed froin position on the track.The frame 9 embodies companion forwardly extending books 29 which, asshown in Figs 3 and 5, are adapted to hook over the rail and rigidlyhold the drill in place. "In these drilling operations it is. highlydesirable, andin factessential, in a a practical drill to provide meansfor feeding theQdrilltool forward, 'It is sometimes-more advantageous tohave such forward feed ot'a manual nature and under the direct controlof theoperator, sohemav stop or start such forward feedashe desires, andat timesit is not be concernedywith actuatingthe mech'a I a face- 40upon which is mounted the driven i otherwise securedto the stem 18,sothat said: collar always rotates in unison- ,with the thereforeprovided in the presentyconstruction both forms of mecl1an1sm, rnamely,an

automatic feed: and a manually controlled stem and at the same timethe-stem is permitted ajlongitudinally sliding movement throughthecollar. This collar in the form illustrated is provided with aninverted U shaped. outer or act g ace pr i the drill" a simple andcompanion members 32 each of which is similar in construction, and'these members which forwardly extending portions termihate in footpieces 37 as will be observed from Fig. 6. The portions 36 are normallyspaced away from one another and tliefor- 8,-togetherwith the drillmechanism,;may

wardly extending portion of one of these sections normally rests againstthe upper surface of the tie. The above described portion 36,

mechanism constitutes'in eflect-a hand brake mechanism. It is obviousthat as the operator presses his foot against the uppermost oftheportions 37 the tendency will be to.

bring thmembers .32 together, thus placing 32 and saidring. Aspreviously stated, this retard the rotary movement of thestem 18,,

The effect will be to cause the spindle 20 together with the drillingtool to advance in a forward direction. This, it is thought,willbeclearly understood from the drawing, where as will be seen, the stemcannot move rearwardly because of the engagement with the socket 25.Therefore,"the retarding movement of thestem will result inthe threadsof the head of the stem andof the chamber in the chuck cooperating toforce the chuck and drill mechanism in alforward direction, the'speed ofadvancement of the drills mem- "her will; be determinedby the size ofthe threads, a fine thread making a slow advancement, and a coarsethread a fast advancement. a, a i i :The foregoing described mechanismis, as stated, a manual mechanismfor feeding the drill tool forward andis absolutely and entirely under the control of the operator. Theformationofthe spindle 17 is perhaps I better illustrated in Fig.4 andas there seen consists of the'usual split drillchuck 38 and.

Thissleeve-like portion has a threaded sun sprocket15 and thisconnection between the spindlez'and sprocket rotates the sprocket inconformity with the actuation of the sprocket. A shoulder 41 is formedagainst which thesprocket abuts, thus locking the same in place, sincethe tendency ofthe sprocket is to crowd against the shoulder whenrotated by reason of the pitch of the threads. a

w'lhespindle at its rear end has-gear teeth 42 which inthe constructionshown are cut a pressure uponthe faces 31 of the ring 30 and creatingfriction between the members ,which emerges into a sleeve-like portion39,

inpthe body of the spindle, and these teeth mesh' with the teeth of agear 43 loosely mounted upon a stub shaft 44, and'splined has joinedthereto a hand wheel 48. The

upon the shaft'is a gear 45. the stub shaft is threaded at one end as at46 and an interiorly threaded collar 47 engages, with said threaded endwhich collar I that they rotate in unison, but upon loosening the handwheel the gear 45 will not be rotated in unison with the gear 43 but thelatter gear will simply turn idle upon the stub shaft. This forms ameans for throwing the automatic feed into and out of operation. v

A gear 49 is splined to the stem 18 wherebyit rotates in unison withsaid stem, but

is capable .of having a longitudinal sliding movement with respect tothe stem and there are a greater number of teeth in the gear 49 than inthe gears 45, 43, or 42. This gear mechanism constitutes the automaticmeans for causing the forward advancement of the chuck, and itsoperation is as follows: Assuming the gears 43 and 45 are broughttogether by manipulating the hand wheel 48, so as to rotate in unison,and as-' suming each of the gears 42 and 43 has twelve teeth, the gear45 eleven teeth, and the gear 49 thirteen teeth. The effect will be tohave the gear 49 rotate slower than the gears 42 and 43, and this gear49 being keyed to the stem 18 will retard the rotative movement of thestem, effecting the forward movement of the spindle as heretoforeexplained. Of course, the spindle in its forward movement will carryforward the frame 8 together the mechanism joined thereto which willinclude the gears 43, 45,

and 49, but owing to the construction all of the above mentionedmechanisms they are capable of a sliding movement with respect: to thestem 18, and can move forward, as desired.

From the foregoing, it will be observed that both in the manuallyoperated forward feed drill as well as inthe automatic feed the saidfeed is produced by retarding the rotative movement of the stem 18. Allportions of the ,drill are efiiciently housed, the gear mechanism beinginclosed by a housing 58 formed with the'frame 8, one side of saidhousing being open and a cap plate 59 being provided for closingthisopen end.

As will be observed from the drawings, the frame 9 is of one piececonstruction, and is contracted at its rear end 52 to provide a mountingfor the pivoted socket, member 25. In order to provide a guide for theforward end of the tool duringthe initial entrance, I arrange a flexiblecradle 53 adjacent the forward end of the chuck, which cradle con-- Theend of.

sists of members in the form of rods 54, which are hooked together attheir abutting ends and are threaded at their outer ends. These threadedportions, IlIl turn, are entered through lugs 55 on the bars of theframe 9 and by manipulating suitable thumb nuts on the ends of the rods,the cradle can be raised or lowered. It will be observed that the cradleisflexible andthat the drill mechanism, as a whole, is capable of amovement in any direction by reason of the universal joint heretoforedescribed.

Therefore the tool is not held rigid so that i it must under allcircumstances follow a.

given line, but is free to move in. any direction that may be mostexpedient during the drilling operation thereby eliminating any dangerof the drill becoming broken by jamming or wedging.

.I'clai'm:

1. In a track drill, the combination of" drillmechanism, meansoperatively connect ed for actuating the same, a horizontally disposedframe embodying members ar- 7 ranged to engage the rail,-and a universalsisting of a ball on the rear end of the drill mechanism and a socket'onsaid .frame .arranged to receive the ball, substantially,as described.

In a track drill,mthe combination 0 drill mechanism, means operativelyconnect-1 ed for actuating thesame, auniversal joint for supporting therear endof the drill mechanism, and a flexible cradle lfor'supportingthe forward end of the drill mechanism, substantially as described.

4. In a track drill, the combination of drill mechanism, meansoperatively connected foractuating the same, a horizontally ex tendingframe embodying members ar-.

ranged to engage the rail, a' socket member on the rear of said frame, aball on the rear of said drill :mechanism seating in said socket, aflexible cradle joined to said hori-. zontal frame and arranged tosupport the forward end of the drill mechanism, and

means for raising and lowering said cradle, substantially as described.

5. In a track drill,the combination of drill mechanism, meansoperati-vely connect ed for actuating the same, a horizontal frameembodying members arranged to engage the rail, a socket pivotallyconnected to the rear of said horizontal frame, a member-'on the rear ofthe drill mechanism seatdescribed! a a t a a a a 7; In -a track. drill,thecombination of" 3 land drill tool carried thereby,- substantially 1ingin said' socket and forming a ilniyer sal joint between I the drillmechanism'f and in upright position, substantially as describedw: "I

=6.Y=In a track drill, the combination "of 1n drill mechanism, meansoperatively connects -e'd for actuating the same, a horizontal 20 frame,and means for locking said socket ed tor-actuating the same, ahorizontal frame embodying members arranged to en? engage: the rail,"said frame being contracted at its rear portion, a socket pivotallymount edin said contracted portion, a 'member on socket in uprightposition, substantially as;

drill mechanism, nieansoperati e1y connectframe embodyingportions'arranged to en "gage the rail, andflsaidfrainebeingcontracb edat {its rear, -portion,-"a socket pivotally mounted' in said contractedportion, a li p extending from. said socket,a key arranged to passbeneath :thelip and lie between the lin "andlthe top of said frame tomaintain the socket in npright position, and a member on the drillmechanism to engage withsaid frame embodying members arranged to en-cgage the rail, a socket member pivotally 1 cured at the rear of theframe, a lipextend 7 ing from said-socket, a ,lockingmember ar socketand tormawuniversal joint, substantially as described. r

' ":8. Ina .track drill, the combination of drill mechanism, meansoperatively connect ed "for actuating the same, a horizontal ranged tolie between the lip and the top of the frame to maintain :the socket inupright position, a. member OII'J'thG rear endof the drill a mechanismarranged to 1 engage with a said soeketand produce a universal joint.

and a flexible .cradlefi at the forward end of said frame forvsupporting the forward endof the drill'mechanism,substantially as 3described.

i In: a tr'a'ck: drill, the of a drill mechanism. including a spindlefor carrying the drill tool and astem, a threaded 1 means' 'operativelyconnected forrotating the engagement" between the spindleuand stem,

spindle, and stem and manually operated frictiondmeansoperableseparately from the spindle rotating means for retardinglltherdta tiomof the-stem to advancethe spindle as described.

--10.'-Ina track drill, the combination of:

drill mechanism including a spindle'for car means for placinga frictionupon the stem and retarding the movement thereof toad Vance the spindle,substantiallyas described: 11. In a track drill, the combination ofdrill mechanism including a spindle for car- ,ryingthe drill toolancl astem, a threaded engagementibetween the" spindle and stem, means forrotating the 'splndle and stem, a collar upon the stem, a member 1n theform of a band brake engaging said collar, a

foot piece on the hand brake tor actuating thesame, said brake whenoperated serving to retard the rotationof the stem and advance thespindle, substantially as described.

12."In a track drill, the combination of a zspindle embodying a chuckportion for carrying a drill tool, said spindle having an interior-1ythreaded bore, a stem having threaded engagement with said interiorlythreaded bore, means for rotating the spindle: andstem, and means forautomatically retarding the rotary movement of the stem to adyancethespindle consisting of'a gear 7 connection between the spindle andstemini parting a reducedsp'eed movement from the spindle to the stem,substantially as described.

a track drill, the combination of drill mechanism including a spindleand a stem, threaded engagement between the spindleand stem, means forrotatinig the spindle and stem, means for automaticallyretardingtherotary, movement of thestem to advance the spindleconsisting of a "gear connection between the spindle and stem impartinga reduced speed movement from the spindle to the stem, and means forbindingselected of saidgears together and allowing themtomove apart toposition them respectively in and out of operative condition,substantially as described MLIn a track drill, the combination of aspindle includinga chuckfor holding the tool, stemfa threaded engagementbe tween the stem and spindle, a gear on the spindle,a gear on the stem,a stub shaft, a gear on the stub shaft meshing with the spindle gear, asecond gear on the stub shaft meshing with the stem gearymeans forbringing said stub shaft gears into close relation causing them to r0tate in unison, the ratio ofthe stem gear and the stub shaft gearmeshingtherewith beingsuch asto reduce the speed of rotation of thestemfromthespced of rotation of the spindle whereby thespindle isadvanced, and means operatively connected for rotating thespindle andstem, substantially as described. 1 i

In a track drill, the combination of drill mechanism including a spindlehaving an int'eriorly threaded bore, said spindle embodying a chuckportion, a driven mem-' her for rotating the spindle, means on the1,117,610 U r a 5 spindle for retaining the driven member forwardadvance Of the spindle, substantiallj thereon, a gear cut upon thesurface of the as described.

spindle, a stem having a threaded engagement with the interior of thespindle, a gear ARTHUR STANFORD 0n the stem, and gears connecting thespin- Witnesses: dle gear with the stem gear to reduce the, WM. P. BOND,

speed of rotation of the stem and cause a I EPHRAIM BANNING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eat-nu.

' Washington, D. C. a

